Canker sores are not contagious and are not related to the herpes simplex virus, also known as cold sores. Canker sores are thought to be caused by: Injuries to the mouth, as seen frequently by contact sports players. Accidentally biting the inside of the cheek or lip may also result in a canker sore.
Mexico has a population of 112,468,855 (July 2010 estimate) and its capital and largest city is Mexico City. Mexico is divided into 32 federal entities, of which 31 are states and one is a federal district. The following is a list of Mexico's 31 states and one federal district arranged by area. The population (as of 2009) and capital of each have also been included for reference.
Gallery. 1  The summit of Pico de Orizaba, a stratovolcano on the border between Puebla and Veracruz, is the highest peak of Mexico. 2  The summit of VolcÃ¡n PopocatÃ©petl, a stratovolcano at the junction of Puebla, MÃ©xico State, and Morelos, is the second highest peak of Mexico.